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J. H. KEYSER. Heating Stove.

Patented March 19. 1867.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN H.-KEYSER, of New York city, in the countyandState of New York, have invented a new and improved Coal-Burning Stove;and I do hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specification, in which- Figure 1 is an elevationof the front of the improved stove.

Figure 2 is a longitudinal section taken' in a vertical plane throughthe centre of the stove, showing the interior CDHSiZlllClZlOXl thereof;v

Figure? is a section through the stove, taken in a horizontal plane,indicated by red line a: :1: in fig. 1."

Figure *1 is a side view of the open fire-pot and its support,

Similar letters ofreference indicate corresponding partsin the'severalfigures.

The nature ofmy invention consists in a stove which'i composed of twoapartments, arranged one above the other, with an open-work fire-potsuspended within the upper half of the lower apartment, and Sustained bythe cap-plate thereof, said lower apartment being provided with one ormore illuminating doors, and adapted to form the main heating andradiating chamber, and also the ash receptacle, while the upperapartment forms the cap of the fire-pot, the entrance for supplying coalthereto, and also the chamber through which the products of. combustionare conducted to the eirit flue; the whole being constructed andarranged in such manner as to afford a very simple andeconomiealcoal-burning stove, as will be hereinafter explained.

To enable others skilled in the artto understand my invention, I willdescribe its eonstructionand operation. In the accompanying drawings Arepresents the cast-iron hollow base of the stove, which isconstructedwith:

a front opening, a, for the removalot' ashes and cinder-s, and also withan annular rim orflange, b, for receiving and having secured to it asheet-iron cylinder, B. This hollow base A is mounted upon legs, and itmay be OOTl structed so as to present a very neat and ornamentalappearance. The cylinder B, which forms the body of the stove, andencloses the main heat-radiating chamber, is provided on its upper endwith a hollow cast-iron cap, which is made of two-horizontal sections 0D, secured to said cylinder by the annular flange c. The upper sectionof this cap is also adapted for receiving and having secured'to it acylinder, E, of less diameter and capacity than the cylinder 13. Thelower cap-section C'is fiat,,and made in the form ofa ring for receivingthrough it and sustaining'a tapering or flaring'fire-pot, F, as shown infigs. 2 and 4. This tire-pot is'con'struct ed of cast iron, with gratedor open-work sides,- and also withan annular flange, (1, upon its upperand largest'end, which flange rests upon the ring C, and thus sustainsthe fire-pot within the upper half of the cylinder B, free from contactwith the cylinder or jacket surrounding it. The lower end of thisfire-pot is adapted to serve as bearings for a turning grate, Gr, 01',if desirable, the rod t of this grate may be made of suflicient lengthto pass through and be supportedby the cylinder B, as shown in thedrawings. In the former instance a removable rod or key will be requiredfor shaking the grate, and in the latter instance a handle will be usedfor this: purpose, applied to the projecting end of said rod. The upperend of the fire-pot or hollow conical grate F is'the only point of thisgrate by which it is sustained, and this point is prevented from rapiddestruction by the heat of the fire, by allowing-of the entrance of coolair through the openings 0 of cylinder 13, which openings are located insuch relation to the upper end'of the grate as to expose this end tostreams of coolair and keep down its temperature. A slide may be appliedto said holes a for regulating the influx of air. The upper section D issecured to the ring section 0 by means of bolts and nuts or othersuitable fastening,'so that this upper section can be readily detachedwhen 'it' is, desired to remove the fire-pot for repair or renewal. Asthe diam-'- eter of the upper ,end of the fire-pot is greater than thediameter of the upper cylinder E, it is necessary to detach the latter,with its base section D, before the fire-pot can'be-taken out of thestove; hence the necessity of having the sections 0 D detachable. Itwill be seenthat the grated-fire-pot is suspended centrally within thecylinder B, so as to leave an annular space between it and this cylinderfor the circulation of air; thus the cylinder is.

protected from destruction by heat radiated from the sides of the openfirc-pot. The fire-pot, being thus sus tained and suspended, there willbe a free draught of air through every part of its sides and bottom,which air will support combustion at such points and keep up a'brilliantand cheerful fire, from which considerable heat will be radiated. Theupper end of the cylinder B beingclosed, except the space occupied bythe fire-pot', it

opening coal is supplied to the fire-pot.

will he seen that the entire draught is through the fire-pot,consequently the coals around the open-grated sides of the fire-pot willbe kept in an incandescent state, and the greatest amount of heat willbe radiated from the cylinder 13, while comparatively little heat willhe carried oil through the upper cylinder E. Through the front and upperpai of the cylinder 13 is an opening, J, which should be provided with amica-light door, through which air inlet openings, corresponding to theopenings 0 through the cylinder B, are made, which are provided with aslide or regulator. The opening J is made large enough to expose to viewthe fire-pot, and also to admit air in large quantities when necessary,which will circulate around, beneath, and through the fire-pot, and notonly facilitate combustion, but protect this pot and'its supporting ring0 from rapidly burning out. Cylinder I) may be provided with severaldoors, if desirable. The upper cylinder E, which covers the uppercnd ofthe fire-pot F, hasa feed opening, K, through its front side-whichshould he closed by a'deor, not shownthrough which Through the rear sideof the cylinder E, and near its upper end, an exit opening, g, is-made,which communicates with a vertical flue, it, through which the productsof combustion descend and escape from the pipe j. Directly opposite theopening g a register, 8, may beapplied to flue h for admitting cool airand checking the draught of the stove. 1

From the above description it will be seen that my stove consists simplyof two apartments, with a removable basket, or open-grated fire-potsuspended within the lower apartment, opposite a transparent orilluminating door, so that during the operation of the stove a brilliantfire will be exposed tovi'cw. The illuminating door may he opened whenthe fire burns well, and this door may be used as ameans of access tothe fire-pot, for poking the fire-pot and clearing its vertical spacesshould they become filled with dead einders. As there is no space in mystove cut ofl from the fire-pot, the entire stove, from base to top,will be subjected to the direct heat of the bed of coals.

I am aware that open-grated fire-pots have been employed before myinvention, as instanced in the patents granted to Lewis Rathbone and\Villiam Haile, November "21, 1865, and Z. Hunt, June 14, 1864-, andtherefore I lay no claim to the invention of an open fire-pot suspendedwithin a stove. My invention relates to a particular mode ofconstructinga stovcembracing the features above mentioned.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

1. A stove, which is composed of two apartments, 13 E, one arrangedbelow the other, with a removable open-grated fire-pot F, which isprovided with a grate, G, said pot being. suspended free from the sidesof the lower cylinder B, and sustained by a cast-iron flanged ring, 0,which is secured permanently to cylinder 13, and whichforms the base forand means ofattachment of the castiron section D of the cylinder E,substantially as described.

2. In combination with a grated or open fire-pot, F, suspended within acylinder, 13, by means of a cap ring,

C, I claim the grate (i when it issustained independently of' thefire-pot and by-the cylinder 13, substantially as described.

3. The combination and relative arrangement of' the air inlet passagesc, with a suspended firc-pot, F, and

with the two detachable cast-iron sections C D, substantially asdescribed, and for the purpose of cooling and preventing said sectionsfrom warping.

4. An open-grated fire-pot, F, which is suspendedwithin the cylinder B,and combined with the removable sections D E, outlet g,- descending fluek, and. :1. damper, s, the latter being lccated opposi te the outlet g,substantially as described. I i

- JOHN H. KEYSER.

Witness es:

WILLIAM F. Huusrou, NATHAN L. ELY

